Diagnosis for diseases of:
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As an optional analysis, according to the client's request or the symptomatology of the crop, the diagnosis of Cane Mosaic Virus (SCMV) and Bacilliform Virus (SCBY) is offered.
Requirements for sampling
Cenicaña offers disease diagnosis services in sugarcane leaf tissue samples from seedbeds and commercial fields.
Who should take the samples?
Samples for diagnosis must be taken directly by the sugarcane grower.
Where should they be taken?
The samples must be sent in the shortest possible time to the Disease Diagnostic Service Laboratory.
The laboratory is located at the Cenicaña Experimental Station, via Cali-Florida km 26. They can also be sent to the Cenicaña liaison office in Cali.
Result
The results of the phytosanitary analyzes are delivered in an estimated time of ten (10) business days, counted from the date of receipt of the samples in the laboratory.
Instructions for collecting samples.
1. Identify sampling points using either of the two ways to route the lot. (Figure A).
2. At each sampling point, identify the first leaf with a visible collar or ligule (TVD leaf, Top Visible Dewlap) (Figure B).
3. Cut the TDV blade from its base, avoiding tearing or damaging the central rib. The collar or ligule of the leaf must be visible. Then cut approximately the first 30cm of the basal part of the leaf (Figure C).
4. Group the basal portions of the 20 TVD leaves that make up each sample and secure them with a rubber band or a fiber or rope twine, forming a bundle (Figure D).
5. Pack the bundles with the samples of each lot in a plastic bag to avoid dehydration and degradation (Figure D).
6. Mark each package with a paper label that includes the following basic information for identification in the laboratory: name of the mill or cane supplier, farm, lot, lot or plank, variety of cane and age.
7. Package the label in another plastic bag, place it inside the sample package, and seal the bag (Figure D). Always follow these instructions to prevent moisture from the plant tissue from deteriorating the paper label and preventing sample identification.
The schedule for entering samples into the laboratory is:
- Monday to Friday between 7:00 am and 4:00 pm
- Samples that arrive outside of these hours will be received at the entrance of the Cenicaña Experimental Station but will only enter the request system during established business hours.
Instructions for sending samples to the laboratory
1. If samples cannot be sent to the laboratory on the same day of sampling, they need to be kept refrigerated in a refrigerator. For shipping, use Styrofoam thermoses that contain cooling batteries at an approximate temperature between 2°C and 15°C.
2. Completely fill the format DP.PV3.2-P01-F01 for the request of the Disease Diagnosis Service (RSD, LDS y SCYLV) and send it to the laboratory along with the samples. This format is available on the Cenicaña website or request it directly from the laboratory.
- Keeping samples refrigerated prevents dehydration and degradation of plant tissue.
- Do not use ice because the excess moisture it generates can cause rotting of the specimens. Keep in mind that samples with symptoms of dehydration or degradation cannot be processed for the diagnosis of diseases.
- For the processing of the samples, it is essential that they arrive at the laboratory along with the completely completed request form. The information recorded in the application form must correspond to that indicated on the label inserted in the sample package. Without the attached application form, samples will NOT be processed.
- Only samples that contain the correctly completed form are received. Download it here.
- Optional Disease Diagnostic Service (SCMV and SCBV) Download it here.
WARNING: The requirements for sampling are Cenicaña recommendations, and are basic to ensure the reliability of the results of disease diagnosis. Samples that do not meet these requirements could generate variable results, including false negatives or false positives. These samples will be received and analyzed in Cenicaña for diagnosis under the exclusive responsibility of the applicant.
Value of the disease diagnosis service: $52.000
This value applies to the diagnosis of each sample for each of the diseases; Soca rickets (RSD), Leaf scald (LSD), Yellow leaf virus (SCYLV), Bacilliform virus (SCBV) and Cane mosaic virus (SCMV). The sample must be taken by the grower.
For the diagnosis of rickets and leaf scald, the TBIA technique is used and for yellow leaf virus, bacilliform virus and mosaic virus, the molecular PCR technique is used.
Price effective as of January 1, 2024.
Detection methodology
Agents LSD y RSD are detected by the serological methodology of TBIA (Tissue-Blot Enzyme Immunoassay) using specific antisera for each pathogen. This technique allows determining the results in percentage of incidence of each disease.
The diseases SCYLV, SCMV and SCBV are evaluated using the molecular technique PCR (Reaction in Cadena of the Pconventional olimerase), based on the extraction of nucleic acids from the infected sugarcane plant. This technique expresses the results qualitatively, giving a positive or negative result according to the presence or absence of the pathogen.
